Updated to support 8, 9, 10 and 16 bits.
Is it normal for expr to not run multithreaded? Or it looks like it:
Code:
No filtering: ~1700 fps, all cores about 50%
finesharp lut: ~400 fps, all cores about 50%
finesharp expr: ~50 fps, one core maxed out, all the other cores almost dormant